diff --git a/test/fixtures/es-modules/tla/unresolved-with-worker-process-exit.mjs b/test/fixtures/es-modules/tla/unresolved-with-worker-process-exit.mjs
index 1860e95a73dd75..8d65baa2b59cce 100644
--- a/test/fixtures/es-modules/tla/unresolved-with-worker-process-exit.mjs
+++ b/test/fixtures/es-modules/tla/unresolved-with-worker-process-exit.mjs
@@ -1,8 +1,6 @@
-import { Worker } from 'worker_threads';
+import { Worker, isMainThread } from 'worker_threads';
 
-// Do not use isMainThread so that this test itself can be run inside a Worker.
-if (!process.env.HAS_STARTED_WORKER) {
-  process.env.HAS_STARTED_WORKER = 1;
+if (isMainThread) {
   new Worker(new URL(import.meta.url));
   await new Promise(() => {});
 } else {
diff --git a/test/fixtures/es-modules/tla/worker-process-exit.mjs b/test/fixtures/es-modules/tla/worker-process-exit.mjs
new file mode 100644
index 00000000000000..42899201b5c0ac
--- /dev/null
+++ b/test/fixtures/es-modules/tla/worker-process-exit.mjs
@@ -0,0 +1,9 @@
+import { Worker, isMainThread } from 'worker_threads';
+
+// Do not use isMainThread so that this test itself can be run inside a Worker.
+if (isMainThread) {
+  new Worker(import.meta.url.slice('file://'.length));
+  await new Promise(() => {});
+} else {
+  process.exit()
+}